Strainer for oil and water wells.



H. R. DECKER. STRAINER FOB. OIL AND WATER WELLS. APPLICATION IILED $3212. 25, 190B. RENEWED SEPT. 24,1909.

Patented m 17; mm.

UNITED sra'rns Parana opinion.

HARRY n. nncxhie, or iious'roia, 'irnxas. I

i sea-mans. sea 01L Ana warm WEEDS.

Specification of t ases resent.

Patented May il't', 3191MB.

Application flied September 25, 1906, Serial m5. 336,109. Renewed September 24, 1909. Serial No. 519,409.

face or perforated or slotted disks are secured in the holes and act as strainers. In an accompanying application is described a process of. drilling wells in which this strainer is used as the lower length of the drill tube and has the holes in the tube plugged with easily removed or. broken plugs so that when the oil or water stratum is reachedthe drill stem may remain permanently in the well'bore and used as the last casing'to be set in the well all that is necessary being torun a tool down the drill tube and break the plugs and the plugged strainer becomes converted into an effective and operative strainer to perform the functions for which strainers are used in wells.

In this application is described'the strainer used in this process which description will accompanying g in whi Fug-lire 1 1s a fragmental longitud n p tional view of a strainer off the disk 'class showing my invention in connection there. with, Fig. 2, a'similar view showing my-invention applied to a wire wound strainer, and Figs. 3 and 4, views showing modifications of the strainer shown in Fig. 1.

In the drawings similar reference characters indicate corresponding parts in the various views.

A indicates the strainer tube in which is drilled a number of holes B and either has perforated disks C secured therein as shown in Fig. 1, to act as strainers, or the tube is wound'with wire D, as shown in Fig. 2, to form the strainer surface. The wire wound strainer such as shown in Fig. 2 is a well known form of strainer while the disk strainer illustrated in Fig. 1 is the subject of my application filed August 1, 1906, and given Serial No. 328,748.

My improvement consists in forming each of the holes B in tube A with an inwardly projecting tapered shoulder E and providing thimble plugs r as. of Babbitt man or other easily fractured substance but which will have suliicient tensile strength to resist the pressure of the oil or water from the outside. Each of the thimble plugs E are provided with a flange G that seats on shoulder E to retain it in position. It Will be understood that the plugs F are secured in position before the disks C are installed or the wire D wrapped on the tube and that the strainer will not operate until the plugs F are broken.

In Fig. 3 is shown a modification in which the shoulder is shown untapered, while in Fig 4 the holes in the strainer tube are stralght and the plugs formed without flanges and retained by friction.

I do not claim in this application any form of strainer but only the combination with a strainer of any type having a perforated tube as its basethe securing of my thimble plugs in the holes in the tube.

Having thus described my invention what I claim is 1. In combination with a strainer co1nprising a perforated tube, frangible plugs secured in the holes in the tube, substantially as shown and described.

2. In combination with a strainer comprising a perforated tube, imperforate thimble plugs secured in the holes in the tube, substantially as shown and described.

3. In combination with a strainer comprising a perforated tube, thimble plugs of frangible material secured in the holes in the tube, substantially as shown and described.

4. In combination with a strainer comprising a perforated tube, frangible plugs secured in the holes in the tube and extend in inside of the inner surface of the tube, su stantially as shown and described.

5. In combination with a strainer comprising a perforated tube, imperforate thimble plugs secured in the holes in the tube and extending inside of the inner surface of the tube, substantially as shown and described. e

6. In combination with a strainer comprising a perforated tube, thimble plugs of frangible material secured in the holes in the tube and extending inside of the inner surface of the tube, substantially as shown and described.

7. In combination with a strainer comprising a tube having holes therein provided with shoulders, imperforate, fran ible plugs secured in the holes in the tube having flanges to seat against the shoulders in the holes, substantially as shown and described.

8. In combination with a strainer comprising a tube having holes therein provided with shoulders, andfrangible plugs secured in the holes in the tube having flanges to seat against the shoulders in the holes, sub stantially as shown and described.

9. In combination with a strainer com-' prising a tube having holes therein provided with shoulders, imperforate frangible thimble plugs secured in the holes in the tube having flanges to seat against the shoulders in the holes, substantially as shown and described.

10. Incombination with a strainer comprisin a tube having holes therein provided with s oulders, and thimble plugs of frangible material secured in the holes in the tube having flanges to seat against the shoulders in the holes, substantially as shown and described.

In testimony whereof I hereto afiix my signature in the presence of two Witnesses.

' HARRY R. DECKER.

Witnesses:

E. S. DEIMI J. C. N. BURKETT. 

